Multiple-tool turning-lathe.



F. K. 'HENDBI'CKSON.

MULTIPLE TOOfiURNING LATHE.

APPLICATION nun MAY 14. 1915.

1 Patel lted July 18, 1916.

5 SHEETSSHEET 1.

witness 'F. K. HENDRICKSON.

MULTIPLE TOOL TURNING LATHE.

' APPLICATION FILED MAY 14. 1915. 7 1 ,19 1 ,305. Patented July 13, 1916.

5 SHEETS-SHEET 2.

Wait ne as F. K. HENDRICKSON. MULTIPLE TOOL TURNING LATHE.

APPLICAHON FILED MAY 14. 1915. 1 ,1 91 ,305. Patented Ju1 18, 1916.

'5 SHEETS-SHEET 3.

fatness '6. F77- F. K. HENDRICKSONJ MULTIPLE TOOL TURNING LATHE.

APPLICATON HLED MAYH. 1915.

Patented +1s,19us

5 SHE -SHEET 4.

Q g W N F. K. HENDRICKSON.

MULTIPLE TOOL TURNING LATHE.

APPLICATION FILED MAY 14. 1915.

5 SHEETSSHEET 5.

Patented July 18, 1916.

FRED K. HENDRICKSON, 0F WORCESTER, MASSACHUSETTS, ASSIGNOR T0 REED- PRENTICE COMPANY. A

CORPORATION OF MASSACHUSETTS.

MULTIPLE-TOOL TURNING-LATHE.

Specification of Letters Patent.

Patented July 18, 1916.

Application filed May 14, 1915. Serial No. 28,183.

To (1. whom it may concern:

Be it known that I. FRED K. l'lrxiumitsox, citizen of the United States. residing at Worcester. in the county of \Vorccster and Stuttof Massachusetts. have invented a new diitl usctul Mi'iltiple-Tool 'lurning-ilmthc. of which the following is a specification.

This invention relates to a turning lathe and particularly designed for the purpose of turning articles of conside able length.

The principal objects of the invention are to provide an arrangement \vherclrv n-plurulit v to tools can he used simultaneously for the turning of an object. either 0t ii uiiitorin ross section or otherwise, so that the length of travel will he proportionatelv decreased and the turning operation expedited in proportion to the, number of tool used; to pro ride o. simple means whereby the several rii ng tools will be controlled in such Elr wzijy v i t'iieir paths oi" tr; l ovciingliicf' ,iiil innii'c exactly the min-4 out and therefore leave the desired surface on the work without regard to the position in which the tools are located along the work and without regard to the particular slnipo or changes in shape which the work iii-cry luivr; to provide it simple means for forcing :ill the ,ools up to the work dur ng the tru el in one direction and relieving the some til: the end ot thc travel, of such a nature that it embodies few parts and has no complications that are. likely to get out of order or adjustment in use; to provide means whereby the tools are held firmly and chattering prevented. both in dividunlly and collectively: and to provide improvements in details of construction of the various parts of the machine.

Reference is to be had to the zvccmnrnrnving drawings in which.

Figure 1 is a front elevation of a lathe constructed in accordance with this invention and arranged for the turning of a gun barrel; Fig. 2 is on end elezition oftho upper part of the same on enlarged scale; Fig. 3 is a sectional view on the line 33 of Fig. 1 showing the drop worm mechanism and connected parts: Fig. i is a front view of the some on enlarged scale: Fig. 5 is a. sectional view on the line 3-5 of Fig. 1: l ig'. (3 is :i plan of port 1 t'the some ith the. tool rest removed; Fig. 2 is n plan 01' the tool controlling cam; Fig. 8 is a plan on enlarged scale of the means for controlling the movement oi the auxiliary tool carriage t0- wiird and from the work, showing the position of the same during the cutting stroke in full lines and the reverse stroke in dotted lines; Fig. J is a front clevation of the same; Fig. 10 is an end view of the same with the bed in section showing the parts in the position shown in full lines in Fig. 8; Fig. ll. is ;1 similar view ith the parts in the position shown in dotted lines in Fig. 8, and some parts omitted; Fig. 12 is a front elevation. of the (21111 for controlling the operating lever shown in Fig. '0: and Fig. 13 is a side view of the pivoted hitch.

The invention is shown as applied to :1 turning lathe having the general characteristics of d wcli known type oi unichine inroli'ing i! lied it head-stock 1].. tail-stock 12. i 'nccf'oznisin for driving the lced rod 1 3. 'l'. rc. h ves a drop worm shalt ii. mi ricd lav the ii a'tlli 20. provided iiith a worm l5 operating :1 worm wheel it). which. by mechanism not shown. controls the traverse ol' the tool carriage. :is is well undcrstood in the art This worm shaft is pivotzillv mounted on :1 stud 18' on the apron 2".) which constitutes n part of the main tool carriage it? and is normally held up by means of :1 pi'o iection 1 movable therewith engaging ii proiection :22 on u spring-pressed lever 13. When the main carriage moves up townrd the head. stationary but adjustnhle stop '24 on the bed enguges a lug '25 on the, lever 23 and prevents the lever moving forward further. Then the two lugs 21 and '2'. separate and the worm shaft drops, thus disconnecting the carriage teed from the power. During the movement in this direction. the power has been raising a weight 26 connected by a cable or chziin '27 with the carriage. 'lherefore, when the power is disconnected from the carriage. this weight is free to drop and it returns the carriage to its extreme right-hand position. This operution is stopped by the weight striking the floor. h n it is desired to start again. it is necessary to raise the drop worm slml t. prcl'ernlilv luv hand. when the log '31 snaps over the lug '31) rind rest. thereon during the working stroke.

'lhis drop worm arrangement does not constitute apart of this in vention, as it is shown and described in a priorapplication of Albert E. Newtonjpd Fred K. Hendrickson on a drop table mechanism for milling machines filed December '21, 1914, Serial No. 878,270.

The main -tool' carriage 29 slides longitudinally on waiys with the apron in the usual way. According to the present invention, this carriage is provided with transverse-ways carrying an auxiliary tool carriage 30 movable toward and from the work and normally held back by a spring 31. Thiscarriage has longitudinal ways 32 on which a series of individual tool rests 33 are located, being held at the rear end by bolts 34 or the like, all located in a Tslot. Each of these tool rests is designed to support a tool T and any desired number can be located on the auxiliary carri: e. In the present instance five of them are shown. .ach individual tool rest is provided with a support 35 on which the tool is'clamped. In each tool rest is an adjusting screw 40 capable of being operated from the front of the machine by anvrench or the like applied to its projecting end. On this adjustmg screw is a nut 41 with which the tool support 35 is connected for the purpose of adjustin this support forward and backward. t the end of-the screw 40 is a spring 42 normally holding the" screw back with a yielding pressure, and another similar spring 43 acts on the overhanging side of the nut 41. The pressure of these springs can be adjusted by means of nuts44 at the ends thereof.

It will he understood that the individual tool holders are adjusted properly and that they are all controlled by the operation of the main tool carriage. Adju'stably located on the bed is a support 45 towhich is slidably connected a long cam 46 having a transverse slot for receiving the end of the support 45. This long cam is free at the other end and thus is capable of movement crosswise, but this is for the purpose of permitting the auxiliary carriage to be drawn back on the reverse stroke. It passes into an opening in the auxiliary carriage and its operative cam face engages cam followers 47 one on each tool rest. \Vith some cams, rolls can be used instead of the followers 47 The springs 42 and 43 hold them against the cam. On the working stroke, the auxiliary carriage is held up to a certain point by.

means to be described. and each individual tool rest is controlled by the cam as the carriage moves.

For the operation of the auxiliary car riage 30, the following mechanism is provided. On the front of the bed is locatdd a plate 50 on which is located a stationary cam 51. This cam is provided with a slanting cam surface 52 at one end, a flat surface 53 on the front, and with an inclined cam surface 54 at the opposite end of the surface 53. The slanting surface 52 is vertical. Mounted on a stud 55, carried by the auxiliary. carriage, is a link 56 which is connected with the end of a lever 57 which is pivoted on a stud 58 mounted on the main carriage. On this lever 57 is pivoted on a horizontal axis a latch 59. This latch is provided with a slanting cam surface 60 for coiiperation with the surface 52 and with an inclined surface (51 for cotiperation with the surface 54. The end 62 is flat. It willbe understood, of course, that the cam 51 can be adjusted longitudinally in slots 65 on the plate 50.

Although it does not constitute apart of this invention, tivo or more work rests 66 are shown provided with the usual counterweights 67 and operating in any desired way. It has been found desirable in practice to use two work rests for the turning of a gun barrel by means of five tools.

The operation of the machine is as follows: Let it be assumed that the drop worm has been put in gear and that the carriage is moving to the left on the operative stroke. The first result of motion in that direction is to bring the cam surface 60 to the left into contact withthe surface and thus cause the lever 57 to be forced forward at that end, and Fig. 8 shows it in full lines in the position occupied just after it has been forced out to its limiting position. Justas soon as the lever 57 turns on its pivot 58 and moves the link 56 inwardly, it forces the carriage 30 in toward the work. The tools all having been properly adjusted before, it will be obvious that these tools are thus forced toward the work but that individually they are capable of moving forward and back and they are controlled indivjdually by the cam 46 so that each tool follows the cam, although the fcarriage 30 is forced positively toward the work a certain distance. The pressure on the lever 57 is transmitted positively, of course, to the auxiliary carriage 30 but is resisted by the heavy spring 31. This resistance is constant and yielding and prevents the chattering of the auxiliary carriage and furthermore, when the cam surface 61 reaches the surface 54 this spring forces the auxiliary carriage back so as to relieve the tools from the Work.

This is permitted by the fact that the surto remainback from the work during the entire reverse motion of the carriage. \Yhen this motion is nca-rllv coin lcte. the surface of the latch which has: been sliding along the surface slides inwari'll on the incline '2 and allows the latch to drop back and the lever, toassumc itso-rifzinal position. at the same time'drawing the tools still farther back I B4 live "tools-are c-n'iplolved, the amount ottr-avel is red'ucednearly one-fifth andthis is an important. feature in. present day practice.

It will be seen-also that the large spring 31 holds theauxiliary carriage in opposition to the positive means formoving the sair 11p toward the work' and that the smallsprings 12 and 43 hold the followers -17 of auxiliary carriage toward the work and a K-POSltlYQ- means for controlling the exact po- ..t5vo,1 )0sitive means arearrange'd to cooper-f atewitheach'other so as to allowof perfect' sition. of each tool indiv'idi'ia-lly, yet these control of the several tools so that at any instantone u'iay be movingn andanother out. On account of this long cam, it is .Qelear that anypart of it will have the same fiect on two tools if they have to be con- .trolled; byft hat. part at differentpoints in their travel.

1 Noclaim ismadeherein to the drop wdi'm aigrangement. the counterweight for returning the carriage, or the work rests, for these features-do not constitute apart of this invention; v

Although I, have illustrated and described onlsa single embodiment of the invention.

I-amaware of the fact that manj modifications can-he made therein by any person' skilled in the art and that the invention can be used for purposes other than that herein shown and described without. departing fromthe scope of the invention as expressed in the claiiiis Therefore, I do not wish to belimited to all the features of construction or to the particular application of the invention herein shown, but

1. In a lathe, the combination of a tool carriage. a plurality of't-ool rests movably mounted thereon. means for-forcing the tool (.llliilQQ toward the work, and means whereby each of'the tool rests is forced toward or from the work and each one controlled individually.

2. In a, lathe. the combination of a main carriage, an auxiliary tool carriage movable cros wise thereon. a plurality of tool rests movably mounted on the auxiliary carriage; means for traversing the main carriage, means for individually adjusting th tool and means wherein the use of this machine. assuming that r1 ,-ii'ie:i; is for positively forcing! the auxliurv m riiage toward --th:e work andl'iolcL no itli'ii' a definite?positionduring the enirc operative trar-e "'ojt' t-h main ;carri-age, .fcl the too l rests forced toward or fromthe work and each one controlled ind'iviilua'll v:

+3. In a lathe, the cijmibination'of a tool carriage, means for traversing it alone' the;

work. a-,plii-ralit vof' individual tool rests mounted on the tool;carriage,, and means whereby each of'saidgtool rests is-individually controlled. and operateclinexactly the same way at a'nydefinite p'ointalong the course of travel 'it" the tool carriage. 1-. In a lathe the combination of'a tool carriaqe movable hack. and forth and also trarisverselvyxa plurality .of individual tool rests mounted thereon and each transversely adjustable, means for holding the tool carriage towardthework, and means extending throughout the length of the work and adapted to control .any of the tool rests that-come into contact {with it for controlling theexact position'of saidtool. rests at. all times during tlie' 'travel of the, tool carriage- 5. In-a lathe,the-combination of'a' main tool'carriage-movable backand forth, a-

plurality oftool rest-s carried withthe main tool carr age, a cam-extending long tudi nally with respect, to the work, aifd neany ca rr-ied by cach tool rest- .for engaging said ca-ni and controlling the position 'of said tool rests on the ear-riage. I

6.1In a lathe, thetombinati'onof a tool Carri-age movable back and forth and also transversely, means; for" holding said tool carriage in a definite position with respect to the :work, a plurality of tool rests mounted on said tool carriage. a ca 'u'extendii'ig throughout the length of the work, means carried by each tool rest forengaging said cam and controlling the position of said tool rests, and yielding means for keeping-each tool rest in engagement with said cam throughout the travel of said tool carriage along the work. I

7. In'a lathe. the combination of a tool carriage movableparallel with the center line of the machine, an auxiliary tool carriage mounted thereon, means for moving the auxiliary carriage transversely a tool rest carried by the auxiliary carriage, a screw connected with the tool rest, and a cam for moving the. screw and tool rest transver toward orfro'm the Work along the auxiaa carriage as it moves along the work. w 8. In a lathe, the combination of a tool carrr movable along the-work, means for posit: By holding the carriage toward the cam controlling the distance of the carriage from the work whiie it moves along, a. tool-rest by and movable with th positively; holding the oarriage'towa'rd the carriage, and means for moving said tool rest owardor from the work moves along'the 'work.

as the carriage 9; Inalathe, 'thecombination of a carriage .movable along the work, means for work, 'acam controlling its" distance from the workwliileiit moves along, a tool r'est carried by and-movable with the'carriage, yielding-means for-forcing said tool rest transversely. on the carriage, and stationary means-for moving said tool rest positively toward the work against said yielding means as the carriage moves along the work.

10. In a lathe;the combination'with a tool carriage movable along the work, positive means for forcing the tool'carr age toward the work and controlling'its position relative to the work as the .tool carriage moves riage transversely movable thereongposi-i -tive'means' for holding the auxiliary car- 'riage toward' the work, a'spring arranged along, a cam extending along the c'arria'ge lengthwise of the work and located in stationary position, a follower en aging the surface of said'cam, an adjusting screw con nected with said. follower and movable therewith, a spring for forcing said adjusting screw and follower toward the cam, and a' tool rest adjnstably Connected with said screw an(l ,a(la pte(l to'move therewith.

11. In a lathe, the eombination of a; reciprocable main carriage, arr-auxiliary carto oppose said'positive means; a tool rest mounted on saidauxihary carriage and adustablethereon in the direct on of motion of the main carriage, and also"transversely;

and means for moving the tool rest trans versely as the main carriage moves longitudinally. i

12. In a lathe-the combination with a tool carriage movable along the work, .aspring for holding the tool' carriage yieldingly away from theiwo'rk, and a cam inposition I to positi ely force the tool carr age back in "opposition to the spring. of a plurality of tool rests mounted on the -'carriage and means separate from the carriage to" eon- Control ofthe carriage at the'iend of the stroke so as to leave the spring free'to-draw 7 the carriage back from the work.

14-. In a lathe, the conib natrn of a tool carriage,- means for "normally forcingdt back from .the work, a lever carried by-the carriage for moving it, a stationary cam' spring, and meanswherebjthe cam-loses located in positionwto engage said lever-to force the carriage against said means, latch on the lever for engaging said cam and having means whereby at the end of the stroke the latch is thrown out of contact with the operative face ofv thefcam and the lever allowed tomove to aposition to allow the first named means to draw thejcarriage back from the work. V

15. In a lathe-the combination of a car riageadapted to move back and forth, a le 'i ver movable back and forth with -the"carriage and-having means for} moving the carriage toward and from thework, a stationary ca'm having-a siirface arranged parallel with the direction of motion ofnthe carriage, and a latch on said-lever adapted to engage said cani during the working stroke and hold the lever and-carriage in a definite position, said latch and cam having means for-.n'ibvingthe latch out of engagement withsai'd sin-face at the end of.

the working strokefwhereby the latch will be prevented from holding the lever in a position to force the carriage to. its extreme inward position. a

In testimony whereof ,I have hereunto set mvhand. 

